WGU C207 DATA DRIVEN DECISION MAKING EXAM QUESTIONS AND ANSWERS LATEST 2025.

WGU C207 DATA DRIVEN DECISION MAKING EXAM QUESTIONS AND ANSWERS LATEST 2025. which decision making model? - ANS -Davenport-Kim three-stage model In which stage of the Davenport-Kim model is problem recognition? - ANS - Framing the problem In which stage of the Davenport-Kim model is data collection? - ANS -Solving the problem What is a key reason we study statistics? - ANS -To make informed decisions Visually presenting the data assists in which stage of the Davenport-Kim model? - ANS -Communicating the results When does research fail to produce reliable results? - ANS -Poor research validity What are the two major issues surrounding research standards? - ANS -Best practices and ethics In order to be a statistically valid sample, the sample must be: - ANS -The appropriate size and random Not selecting a random sample is what type of bias? - ANS -Measurement Not selecting a right sized sample is what type of bias? - ANS -Measurement Research best practices eliminate... - ANS -Bias Outliers create this type of error - ANS -Out-of Range Unpredictable error - ANS -Random Error - No correlation Omission Error - Distorted results This error repeats itself - ANS -Systematic Error - Skewed results Observation points that are distant from other observations. - ANS -Outliers Note: Can be included or excluded in analysis (causes skewness) Types of Bias: Bias that occurs from not selecting a random sample - ANS - Measurement bias Types of Bias: Bias introduced because respondents believe it will be beneficial if selected. - ANS -Conscious bias (key word: benefit) Consistent and repeatable data - ANS -Reliable Resulting from accurate measurements - ANS -Valid data If a responder lies on their survey, this creates what type of bias? - ANS - Information Sorting your spreadsheet can expose these errors by moving them to the very top or the very bottom of the column - ANS -Omission or Out-of-Range An error that will fix itself over time - ANS -Random An error that will not fix itself. You must do something - ANS -Systematic Cleaning and organizing data - ANS -Data Management Are the following variables quantitative or qualitative? Personality type, social class, or communication style - ANS -Qualitative A study used when your conditions can't be controlled - ANS -Observational study Observes people going forward in time from the time of their entry into the study. - ANS -Cohort Study What are the three elements of an experimental study? - ANS -Unit, Treatment, Response Accurately measures what it is intended to measure - ANS -Valid data an experimental study prevents bias. - ANS -Blinding Neither the treatment allocator nor the participant knows in which group the participant is contributing. (Who is getting the real drug?) - ANS -Double blind study The participants are not told if they are in the treatment group or control group - ANS -Blind study Describes characteristics of a dataset. Mean, median, mode, variation, standard deviation, range.... - ANS -Descriptive analytics Uses data from the past to predict the future - ANS -Predictive Uses experimental design and optimization to predict a future - ANS -Prescriptive If we move to six appointments an hour we can increase revenue 2%. Which form of analytics is this? - ANS -Prescriptive - We are taking a specific course of action Based on the last four quarters, we can predict $4,1 million in sales next quarter. Which form of analytics is this? - ANS -Predictive: We aren't taking any action The number of appointments per day averaged 7 over the last 6 months. Which form of analytics is this? - ANS -Descriptive: We are only describing the past. No future predictions are made. Is Big Data structured, unstructured or both? - ANS -Both Where do we store big data - ANS -In a big data warehouse Why do marketing teams use big data? - ANS -"Datamining" assists in targeting the best customers for new products or reaching existing customers for like products Name the 4 levels of measurement - ANS -(NOIR) Nominal, Ordinal, Interval Ratio Continuous data with unique zero point is level of measurement. - ANS - Ratio Orders data at equal distance apart is level of measurement. - ANS - Interval Identify, Group, or Categorize is level of measurement. - ANS -Nominal The colors of cars are which level of measurement? - ANS -Nominal The price of the car is which level of measurement? - ANS -Ratio Which level of measurement can be multiplied and divided? - ANS -Ratio Which level of measurement cannot be analyzed which most statistical test? Answer-Nominal A good sample of the population being studied will be the right size and Answer-Random If a sample is not random it creates - ANS -Measurement Bias If a sample is not the right size it creates - ANS -Measurement Bias Measuring the housing market in North Carolina when making an inference about the entire East coast is an example of - ANS -Non-representative Sample Lemonade sales increase when it is warmer than 75 degrees. Weather and lemonade are - ANS -Correlated. "NOT CAUSE" Pulling names from a hat is a tool to create a sample - ANS -Random Asking participants to taste test a yellow candy and a blue candy and select one can create bias. How can we prevent bias? - ANS -Blinding You are taking a survey and the question is leading. It seems advantageous to answer a specific way. What type of bias is this? - ANS -Conscious KEYWORD: Benefit A question is not leading, but you feel your boss might want you to answer a specific way - ANS -Response You feel there is an "expected" response and may not answer honestly (no leading) Pread of the data - ANS -Standard Deviation A normally distributed sample spreads from -3 to +3 standard deviations from the mean